Actually, knights is just a unit name for really good cavalry. Knight is just a nobleman, and earlier they're called nobles, later they're called knights. The unit royal knights was IMO just going to be a unit of elite cavalry. Maybe it'll be removed, I don't know...

Re the Normans not existing before 911, that's correct, but we didn't want to drop the normans so we kept them anyway, although they'll hopefully be kept really weak before 911 AD.